Traction device for motor-vehicle wheels



Nov. 13 1923.

Filed March 22, 1920 G A PURDY TRACTION DEVICE FOR MOTOR VEHICLE WHEELS and wearing qualities.-

"LMBQFZ FATENT @FFHTZE.

GEORGE A. PURDY, fill SEATTLE WASHINGTDN.

TRACTION DEVICE MOTOR-VEHIGLE WHEELS.

.7 '0 all whom 2'2? hwy-concern:

Be it known that I, Gnonen A. lPUnnr, a citizen of the United States of America, re-' siding at Seattle, in the county of King and State of Washington, have invented certain new and useful Tmprovements in Traction Devices for Motor-Vehicle Wheels, of which the following is aspecification, reference being had thereinto the accompanying drawings.

The driving wheels of motor vehicles often spin when power is applied thereto if the wheels are resting upon soft ground or smooth ice, and to give traction many attachments have been devised employing chains and other metal devices with means for fastening these devices over the tread of the wheel. The object of this invention is to provide a device for the purpose which may be quickly attached to the vehicle wheel when needed.-

The invention consists in providing a fabricated traction device which may be quickly fastened about the tire and mm of a wheel and will have the necessary strength The invention further consists in fabricating a traction memher in such a manner as to give the necessary strength without increasing the cost of production to such an extent that the device cannot be sold for a small price. The invention also consists in' certain other new and useful features and in the matters hereinafter set forth and more particularly pointed out in the appended claims, reference being had to the accompanying drawini in which ig. .1 is a plan view of a device illus which is made up of a" number of thicknesses of burla or other cheap and strong woven fabric wlii tion, this fabric being preferably .cut in strips folded upon themselves to give the desired number of layers of fabric as illusch will give the maximum of trac-.

Application filed March 22,- 1920. serial No. 367,602.

trated in Fig. 3. These strips are so cut and formed asto produce the body with tapering ends and after the fabric 3 is folded to the proper form with a plurality of thicknesses at each side of the body, longitudinal cords l are 'laid inthe body lengthwise thereof to give tensile strength to the body and prevent undue longitudinal stretching under the severe strain when in use. These cords l may be of any suitable material, such as metal wires, but preferably are very strong fabric cords which are laid in the body longitudinally thereof and converge in the tapered end portions of the body. Any desired number of these cords may be used but as illustrated there are four cords spaced apart and held in spaced relation within the center of the bodyuhy suitable fastening means, indicated at 5, extending through the several fabric layers between the several runs of the cords. The fastening means 5 may be stitching formed by the use of a very strong thread or small cord or wire or other suitable staples may be used and preferably the cords 4 are arranged in pairs, the cord of each pair being made continuous so that loops 6 will be formed at the ends of the body, the looped ends of the cords being extended beyond the tapering ends of the body just sufficiently to engage suitable means for fastening the two ends of the body together about the tire and rim of the vehicle wheel. After the cords have been laid in the body as previously described and secured in spaced relation therein by means of the fastenings 5, the two side ed es of the folded fabric formin the two sides or faces of the body, are preIei-ably secured together by stitching 13 of strong thread or cord or these edges may be connected in any other suitable manner to securely hold the edges together and bind the outer runs of the vlongitudinal cords in place in the bod S mple and efficient means for fastening the ends of the bod together, which means may be quickly an conveniently connected in placing the device u on a wheel, is illustratedin Fig. 5 wherem ametal'loop 7 is attached to oneend of the body to pass through another metal loop 8, attached to the other end of the body, said metal loops being formed to interlock after the metal .loop 7 has been passed through the loop 8.

the loop 7 is formed with a cir Preferabliy portion 9 -and a laterally excular en till tending loop portion 10 adopted to receive the loops 6 of the cords 4 and the metal loop 8 is of somewhat similar form but of less Width and greater elongation, it having a' head or end portion ll with a. laterally extending elongated neck portion'12 to receive in the end thereof the loops 6. The head 9 or" the loop 7 is of suchn Width that it will readily pass through the loop 8 to a. position transversely thereof and will not the device and securely hold it in place. The

fabricated body will adhere with great force to a slippery surface and because of the width of the body, sufiicient traction will be given by the placing of one or more of these traction devices on a. wheel to move the vehicle out of a hole or from the slippery portion of the roadbed.

Because the fabricated body with its longitudinal strengthening cords is very light in Weight, severalof these devices may be readily carried in the machine and be cause of the small cost of manufacturethe motorist will not be burdened with undue expenses in providing himself with the necessary -number of these devices. it is also obvious that this body. may be made up of any desired number of thick- :neraere j nesses of materiel which may be secured together in any suitable manner and the ends in the scope ot' the appended claims, and do not limit myself to the particular con-.

struction shown.

Having thus fully described my invention, what ll claim is l. A traction device comprising an elongated fiat body having tapering ends, and formed of a plurality of layers of fabric. and strengthening cords estending longitudinally of the body in spaced relation and out through the tapering ends of the body. and means at the ends of the body connected to said cords for detachably attaching the device to a vehicle wheel.

2. In a traction device, the combination of a fabricated body comprising a plurality ot' superposed layers ot' fabric, and strengthening cords extending longitudinally of the body end formed with loops projecting from the ends of the body, and means it'or securing the several layers oi febric together between the runs out the cords to space the same apart and hold the fabric tognetherend fastening means engaged with the projecting loopedends of the cords tor fasten ing the device to e vehicle wheel.

in testimony whereof ll stfix my signature III the presence of two witnesses.

GEORGE A. PURDY. Witnesses:

ANNA Ms Donn, ANNA C. RAVILEB. 

